diff --git a/configure.in b/configure.in
index bc49710..117ecb5 100644
--- a/configure.in
+++ b/configure.in
@@ -17,7 +17,7 @@ AC_MSG_CHECKING(whether to enable debugging)
 AC_ARG_ENABLE(debug,
   [  --enable-debug          show debug information],
   AC_DEFINE(DEBUG)
-  debug=$withval,
+  debug="yes",
   debug="no"
 )
 AC_MSG_RESULT($debug)
@@ -25,9 +25,9 @@ AC_MSG_RESULT($debug)
 if test $debug = "yes"; then
 	CFLAGS="-g"
 else
-	CFLAGS="-Wno-unused"
+	CFLAGS="-Wno-unused -O6"
 fi
-CFLAGS="-Wall -Wp,-lang-c-c++-comments -O6 $CFLAGS"
+CFLAGS="-Wall -Wp,-lang-c-c++-comments $CFLAGS"
 export CFLAGS
 
 dnl Checks for programs.